Ecvv Trade
the pre-existence of Tianhe Petroleum Machinery Joint-Stock Co., Ltd

China Manufacturer with main products: Drilling Tool, Fishing Tools, Such as Stabilzer, Bucking Unit, Drill Collar, Heavy Weight Drill Pipe, Casing Scraper

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Spiral Drill Collars


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Specifications

Drill collar is mainly used to provide bit weight to drill bit so that drill piipe is in tension. Especially drill collar can keep drill bit centralized and hole tradck by large rigidity. Spiral drill collar is used to reduce contact area with hole so as to avoid efficienty bit stricking from differential pressure. Our drill colars are manufactured as per API spec.7.
 
 
Drill collar thread type
OD
ID
Length (mm)
NC23-31
mm
in
mm
in
 
NC26-35(23/8″IF)
79.4
3 1/8
31.8
11/4
9150
NC31- 41(27/8″IF)
88.9
31/2
38.1
11/2
9150
NC35-47
104.8
41/8
50.8
2
9150
NC38-50(31/2″IF)
120.7
43/4
50.8
2
9150
NC44-60
127.0
5
57.2
21/4
9150
NC44-60
152.4
6
57.2
21/4
9150 (or) 9450
NC44-62
152.4
6
71.4
2 13/16
9150 (or) 9450
NC46-62(4″IF)
158.8
61/4
57.2
21/4
9150 (or) 9450
NC46-65(4″IF)
158.8
61/4
71.4
2 13/16
9150 (or) 9450
NC46-67(4″IF)
165.1
61/2
57.2
2 13/16
9150 (or) 9450
N50-67(4 1/2″IF)
165.1
61/2
71.4
2 13/16
9150 (or) 9450
NC50-70(4 1/2″IF)
171.4
63/4
57.2
2 13/16
9150 (or) 9450
NC50-70(4 1/2″IF)
171.4
63/4
71.4
2 13/16
9150 (or) 9450
NC50-72(4 1/2″IF)
177.8
7
57.2
2 1/4
9150 (or) 9450
NC50-70(4 1/2″IF)
177.8
7
71.4
2 13/16
9150 (or) 9450
NC50-72(4 1/2″IF)
184.2
71/4
71.4
2 13/16
9150 (or) 9450
NC56-77
196.8
73/4
71.4
2 13/16
9150 (or) 9450
NC56-80
203.2
8
71.4
2 13/16
9150 (or) 9450
6 5/8″REG
209.6
81/4
71.4
2 13/16
9150 (or) 9450
NC61-90
228.6
9
71.4
2 13/16
9150 (or) 9450
7 5/8″REG
241.3
9 1/2
76.2
3
9150 (or) 9450
NC70-97
247.6
93/4
76.2
3
9150 (or) 9450
NC70-100
254.0
10
76.2
3
9150 (or) 9450
8 5/8″REG
279.4
11
76.2
3
9150 (or) 9450

Service Process

Service Guarantee

  • Free Service Charge

    ECVV doesn't charge any service fee to Buyers for buying this product.

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    ECVV is responsible for supply, and provides product quality inspection, fund supervision and supply chain services.

  • Product Quality Commitment

    ECVV China Sourcing Agent will assess the reputation and supply ability of the factory and conduct field trips to select the high-quality Chinese factories for buyers.

  • Deposit Service Commitments

    In order to improve the quality of service, ECVV will charge for a 100CNY deposit for the agent purchasing order, and the deposit will be part of subsequent purchasing costs.

    After paying a deposit, if the purchasing order is not completed because of unsatisfied ECVV services, ECVV will refund your deposit.

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